HowTo fix a corrupted usb flash drive

hey guys!
my usb flash drive has been corrupted and i really need it to work , i get this message whenever i plug it into my pc

"Error mounting /dev/sdg1 at /media/gray/KINGSTON: Command-line `mount -t "ntfs" -o "uhelper=udisks2,nodev,nosuid,uid=1000,gid=100 0" "/dev/sdg1" "/media/gray/KINGSTON"' exited with non-zero exit status 13: Corrupted file $UpCase
Failed to mount '/dev/sdg1': Input/output error
NTFS is either inconsistent, or there is a hardware fault, or it's a
SoftRAID/FakeRAID hardware. In the first case run chkdsk /f on Windows
then reboot into Windows twice. The usage of the /f parameter is very
important! If the device is a SoftRAID/FakeRAID then first activate
it and mount a different device under the /dev/mapper/ directory, (e.g.
/dev/mapper/nvidia_eahaabcc1). Please see the 'dmraid' documentation
for more details."

anyway i could fix it !!!
plz help